在一个企业价值链的诸多活动中每个环节都创造价值。()
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According to Paragraph 1, we can infer that______.
A. the mass tend to be more depressed this year
B. the third Monday of the month is our most depressing day of the year
C. Arnall"s theory has won widespread favor in the public
D. Arnall"s theory inspires the author to propose his own theory
我国将在二十一世纪步入老龄化社会，请说出这一变化所形成的市场机会？
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